21680175

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{2389}}^1$

素因数の和:2424

約数の個数: 36

約数和(自身を含む): 39415880

約数和(自身を除く): 17735705

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 121, 165, 275, 363, 605, 825, 1815, 2389, 3025, 7167, 9075, 11945, 26279, 35835, 59725, 78837, 131395, 179175, 289069, 394185, 656975, 867207, 1445345, 1970925, 4336035, 7226725, 21680175]

約数ペア:

[(1, 21680175), (3, 7226725), (5, 4336035), (11, 1970925), (15, 1445345), (25, 867207), (33, 656975), (55, 394185), (75, 289069), (121, 179175), (165, 131395), (275, 78837), (363, 59725), (605, 35835), (825, 26279), (1815, 11945), (2389, 9075), (3025, 7167)]